Common wisdom tells us the best foreign words and phrases to learn when in an unfamiliar place are the local equivalent of “Hello,” “Good morning,” and “Where’s the bathroom?” — just to name a few of the most polite things to say.

But watch this video and you might want to reconsider enrolling in a rather formal language school.

It seems the guy on the video teaches under the premise that knowing these expletives would help Korean tourists be aware of what people they meet might say.

So you won’t have to nod your head in agreement or say, “Thank You!” when someone says, “F**k you” or any expletives one might hurl at you, especially in public.